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U.S. Geological Survey Open-File Report 2011–1004

Sea-Floor Geology and Character of Eastern Rhode Island Sound West of Gay Head, Massachusetts

Conversion Factors

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SI to Inch/Pound

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centimeter (cm) 0.3937 inch (in.)
millimeter (mm) 0.03937 inch (in.)
meter (m) 3.281 feet (ft)
kilometer (km) 0.6214 mile (mi)
kilometer (km) 0.5400 mile, nautical (nmi)
meter (m) 1.094 yard (yd)
square kilometer (km²) 0.3861 square mile (mi²)

Phi-notation (Krumbein, 1934) as used in this report is defined as: Φ = -log 2 (d), where d is the grain diameter in millimeters. Phi-class intervals in millimeters are given in the data dictionary of the Sediments section.

Current speeds are measured in knots (kts). 1 knot = 0.514 m/s.

Horizontal coordinate information projected in Universal Transverse Mercator (UTM) Zone 19 is referenced to the North American Datum of 1983 (NAD83); horizontal information in geographic coordinates is referenced to the World Geodetic System 1984 (WGS84). The vertical datum for tidal-zone measurements is mean lower low water (MLLW).

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